Guitar controller



FIG. 1 is a perspective view of a guitar controller illustrating our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is another side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown are included for the purpose of illustrating the unclaimed portions of the article and form no part of the claim. 

The ornamental design for a guitar controller, as shown and described. 